A linear second order, single degree of freedom system has a mass of 8 x 103 kg and a stiffness of 1000 N /m. Calculate the natural frequency of the system. Determine the damping coefficient necessary to just prevent overshoot in response to a step input.
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- An 4-kg mass is attached to a spring hanging from the ceiling and allowed to come to rest. Assume that the spring constant is 20 N/m and the damping constant is 2 N-sec/m. At time t = 0, an external force of F(t) = 2 cos (2t + ) is applied to the system. Formulate the initial value problem describing the motion of the mass and determine the amplitude and period of the steady-state solution. Let y(t) to denote the displacement, in meters, of the mass from its equilibrium position. Set up a differential equation that describes this system. (give your answer in terms of y, y', y"). The amplitude of the steady-state solution is m. The period of the steady-state solution is radians. If you don't get this in 3 tries, you can get a hint.A mass of 2 kg on a spring with k = 6 N/m and a damping constant c= 4 Ns/m. Suppose Fo = v2 N. Using forcing function Fo cos(wt), find the w that causes practical resonance and find the amplitude.A 20.5 kg object oscillates at the end of a vertical spring that has a spring constant of 3.04 × 10! N/m. The effect of air resistance is represented by the damping coefficient b = 4.00 kg/s. Calculate the frequency of the damped oscillation.
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- A machine is represented as a single degree of freedom spring-mass-damper system. The machine has a total mass of (100 + 21) kg, an out-of-balance mass 0.125 kg, eccentricity of 0.01 m, coefficient of damping (100 + 21) N/ (m/sec), and spring stiffness (1000 + 21) N/m. The rotational speed of the machine is 3000 rpm. Determine the maximum amplitude of vibration due to out-of-balance. Suggest a method for the control of vibration caused due to out-of-balance.A cart of mass m = 1.6 kg placed on a frictionless horizontal surface and connected to a spring with spring constant 6 N/m. The damping force strength is given by b = 255 g/s. The cart is pulled away 16.5 cm and released. k m 'b a. Calculate the time required for the amplitude of the resulting oscillations to fall to 1/7 of its initial value. 24.4 b. How many oscillations are made by the cart in this time? 7.51The suspension system of a 2100 kg automobile "sags" 7.0 cm when the chassis is placed on it. Also, the oscillation amplitude decreases by 45% each cycle. Estimate the values of (a) the spring constant k and (b) the damping constant b for the spring and shock absorber system of one wheel, assuming each wheel supports 525 kg. (a) Number (b) Number 73500 Units N/m Units kg/s 4